Blast-nozzle.



F. A. BABCOGK.

BLAST NOZZLE.

APPLIoATIoN FILED 001221, 1910.

992,144, Patented May 16, 1911.

WITNESSES l INVENTR bRNEYs surrounding the column or UNITED STATES PATENT oEEIcE.

man A. seacock, or wYNDMooE, PENNSYLVANIA.

' BLAST-Noma.

To all whom it may concern:

Be it known that I. FRED A. citizen of the United States, residing lvyndmoor, county of Montgomery, tate of Pennsylvania, have invented a new and useful Blast-Nozzle, of which the following is a specification.

My invention consists of a suction-nozzle or blast-nozzle in which'the actuatedv medium is axially introduced and the actuating medium introduced in an annular Jet jet of the actu- BABcocK, a

ated medium. Y

It further consists of such a nozzle in which the jet of the actuatin medium 1s controlled by adjustment of t e tubeiconve in the actuated medium.

-my limproved blast-nozzle.

ther consists of improved means for creating the annular actuating et.

It further consists of improved means for vrenewing the jet tube when worn or broken.

It further consists of other novel details of construction, all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, I have shown in the accompanying drawin one form thereof which is at present pre erred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to 'be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of instrumentalities as herein shown and described.

VFi e 1 represents an axial section of Fi 2 represents a face view of the baille-p ate or diaphragm in the blast-chamber. l

imilar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings: The device embodyi grmy invention may be employed for the urpose of creating a jet or spray of any uid, gas, lsteam granulated or pulverized substance by means of a fluid under pressure, but it is lgarticularly designed to 'create a sand-blast y means of compressed air as the actuati medium, for the various purposes for whic such sand-blast is used. It must therefore be understood that wherever the words f air or"sand are used in the following description, such terms are merely employed for convenience sake and refer, respectively, to the actuating me- Speoication of Letters Patent. .ap'puoauon mea october 21, 1910. serial m.

atl

Patented May 16, 1911. 588,338.

dium and the 'actuated medium" irrespective of whatever said media may be.

The device has a casinor composed of two parts, 1 and 2, of preferably conical outlines, with the cones placed base to base, and formed with conlcal communicatin cha-mbers, 3 and 4, in their interiors, bot forming a blast-chamber. The rear part 1 of the casing has an externally screw threaded forward end, 5, upon which an internal screw thread, 6, in the rear of the forward part 2 is screwed,a groove, 7, being formed at this joint, into which the suitable portion of a bale-plate or perforated diaphragm, 8, is clamped. This baille-plate has an annular passage formed by. a series of openings, 9. A blast-inlet pipe, 10, for theV actuating medium,-compressed air from a compressor and reservoirr-is suitably secured (by screwthreadsl into the rear ofthe rear conical chamber. l supply-pipe, 11, is screw threaded in the -rear wall of the rear part of the casing to extend axially through the two blast chambers and through a central opening, 12, in the baille-plate and has a lock-nut, 13, upon it for locking it in its adjusted position. The end 14, of the supply-pipe is beveled or tapering to form a valve which corresponds to a beveled or tapering valve-seat, 15, with which the casing is provided, preferably at the forward end of the forward conical chamber. A washer, 16, bears against the forward face of the seat and a mingling-chamber is formed in a jet-tube, 17, having its inner end screwed into the forward end of the forward chamber, and inclosing a lining tube, 18, which is clamped with its inner end agalnst the washer by a shoulder, 19, within the jet-tube, bearing against thc outer end of the lining-tube.

In practice, the pipe for the actuating medium (the blast-pipe 10) is connected to a source of fluidV under pressure (compressed air,) and the supply-pipe for the actuated medium (sand) is connected to a suitable supply reservoir. lVhen the blast is started, the air enters the rear chamber land fills the same, whereupon it passes into the front chamber through the annular passage in the batlie-plate. As said passage is annularly arranged, the air-blast will be evenly distributed in the front chamber and around the supply-pipe, notwithstanding the blastpipe entering the side of the rear chamber. The air-current in the front chamber coning. When the supply-pipe 1s properly adjusted to give the proper blast-opening, the

lock-nut is tightened'to secure the pipe in its adjusted position. 'lhevalve-seat may be, in the constru ,tion here shown and prefer ably employed, moved and adjusted by removing the jet-tube and the washer, and they lining-tube of the mingling-chamber the jet-tube, which `wearsout frequently on account of its exposure to the full strength of the sand-blast, may be renewed by unscrewing the jet-tube, inserting a new liningplace.y

By forming the rea-r chamber conical and rearwardly tapering and having the blast` pipe entering it in a forwardly oblique di` re'ction, the blast passino' around the supply-r deflected, and guided pipe will bc forwardly through the baftoward the annular passage fle-plate.

By placing yated medium t e supplypipe for the actuated Amedium will have a straight path through said pipe and the entire device, wherezliy clogging of a pulverized or granulated medium such as sand, in said pipe will be avoided, and the entire supply-pipe and jet-tube will furnish a direct and axially` alined duct. l Y

By forwardly tapering the forward chamberl and making the parallel faces of the seat and the end of the supply-pipe at an angle to such taper, to cause a comparatively abrupt convergence of the annular blast opening and ofthe blast of the actuating medium in its relation to the end of the supply pipe, the vacuum formed by the airblast will be close to the end of the supplyipe and thus exercise' greater suction than 1f such blast opening had a longer and more gradual taper, and the surface friction for the converging annular. air-blast against 'the sides of the comparatively short blast-opening will be vless than in an opening oflong taper. The valve-seat may be renewcdby simply the washer and seat, inserting a new seat and replacing the washer and tube, without disturbing any other parts of the device.

While I have described. the pipelO as the blast inlet pipe and the pipe 11 as the suptube and againV screwing thek jet-tube in;

axially withm the jet of the.. actuating medium, the supply of the actusy unscrewing the jet-tube, removing ply pipe, I dcsire it understood that under some conditions the air. may be passed through pipe 11 thus servingl as an inlet while the pipe 10 may serve as the supply pipe. For example, I maycmploy a nozzle for use in spraying plants in which event I may employ a gas or fluid which I may desire to mix with air and conducting the gas or lluid through pipe. 10 while the air is passed through pipe 11.1 I further desire it understoodthat any form of discharge opening forthe jet tube 17 .may be employed,=as in some instances I may desire'the discharge end tobe provided with a slot or plurality of openings, in order to form the spray which may be employed. k

Ha g th described my invention, what I claim as new and desire to secure by Letters Patentis:- A

1. Ina device `of the character stated, a` casing having inlet for the actuating fluid and having a forwardly tapering chamber. and a. valve-seat at the end of said chamber and at an abrupt angle to the taper `of the same, and a supply-pipe axially within saidl chamber and having its forward end beveled at the same angle as the seat to form with a it an annular abruptly convcrgingpblastopening, whereby the vacuum is created closely in front of the` mouth of the supply P199- 2. In a device of the characterrk stated, a casing having inlet for the actuating luid and having a forwardlytapering chamber,

and a valve-seat at the end of said chamber and at an abrupt angle to the taper of the same, a supply-pipeaxially within said chamber and having `its forward end 'beveled at the mme angle ask the seat to form with it an annular abruptlyl converging blast-opening and a jet tube secured in the forward end of the casing and in axial alinement with the supply-pipe, whereby the vacuumis created closely in; frontfof the4 mouth of the supply-pipe and the jetdirected by the tube.

3. In a device oft-hey character stated, a casing having a .forwardly tapering chamber having inlet'forl the actuating fluid, a y

valve-seat removably `secured in an opening in the apexrof such chamber and having its seat surface atan abrupt angle to the taper of the same, a Supply-pipe axially .within said'chamber and having its end beveled at the same angle as the seat to form with it an annular abra tly` converging blast-opening, and a jet-tn projecting from-the forward end of the blast-tube in axial alinement withthe supply-tube. j j t 4. In a device of fthe character stated, a casing composed of two tapering parts having tapering chambers within them and secured together at their wider ends, an an-V nular baille-plate clamped between the wide a annular series of openins2 a blast-supply annular abruptly converging blast-opening, 10 pipe secured forwardly o llque in the rear and a jet-tube projecting from the forward chamber, a valve-seat in the apex of the forend of the blast-tube in axial alinement with Ward clamber allid ha'ling its sefathsurfalfie the supply-tube.

atanarutan etotetaerotewas Y of the chalnbeigg a suppl -pllbe axially sup- FRED A BABCOOK ported throgh the cham ers and baille-plate Witnesses:

and having its forward end beveled at the C. D. MCVAY,

same angle as the seat to form with it an F. A. NEWTON. 

